sony ericsson tricks 2
1. reach a contact beginning with a specific letter by pressing and holding any of the keys 2-9 when in standby.
2.for speed dial goto contact -> options -> speed dial and speed dial by pressing any of the number 1-9 and press call.
3. to turn off the microphone during an ongoing call, press and hold C until the mute icon appears and again press C to turn on the microphone.
4. press one of the volume button at the right side of the phone to turn of the ringtone or press # when receiving a call.
5. press and hold # key to set the phone to silence mode and to cancel the silence mode.
for more information goto --> menu --> settings --> general --> setup wizard in the second last --> tips and tricks
NOTE: these tips are applicable only to sony ericsson phones.
for SE mobiles???
Mine is a nokia and it has the same features.
So your trick was??